$OpenBSD: patch-vmtbl_c,v 1.1 2017/05/12 20:27:25 naddy Exp $

Index: vmtbl.c
--- vmtbl.c.orig
+++ vmtbl.c
@@ -16,6 +16,7 @@
 # include <curses.h>
 #endif /* PSC */
 
+#include <unistd.h>
 #include "sc.h"
 
 /*
